To see if it is interlaced, interpret with fields “off”. If you then see interlacing, it was interlaced.
To confirm the proper field order (NOT “DOMINANCE”, APPLE!) re-Interpret lower fields first. Alt-double-click on the clip in the Project window. Step through the video in the window that just appeared, using the PageDn key. If the video jerks back and forth (ugh!), it should have been interpreted Upper field first.